a thin membrane, or inner or third eyelid, present in many animals, capable of being drawn across the eyeball, as for protection.
(in reptiles, birds, and some mammals) a thin fold of skin beneath the eyelid that can be drawn across the eye Also called third eyelid, haw
A transparent inner eyelid in birds, reptiles, amphibians, and some mammals that protects and moistens the eye without blocking vision.
nictitation nic·ti·ta·tion (nĭk’tĭ-tā’shən) n. Winking.
abbreviation 1. neonatal intensive care unit neonatal intensive care unit
National Indian Child Welfare Association